Inductive telephone and telegraphic installation.



H. VON KRAMER. INDUGTIVE TELEPHONE AND TELEGRAPHIC INSTALLATION. APPLICATION FILED AUG.17,1911.

L4Q4JL3 Patented N0v.26,1912.

2g 4 SHEETS-SHEET 1.

N1TNE$SES;

H. VON KRAMER. INDUCTIVE TELEPHONE AND TELEGRAPHIC INSTALLATION.

APPLICATION TILED AUG.17, 1911 1,045,411 3., Patented Nov. 26, 1912.

4 SHEETS SHEET 24 H. VON KRAMER. INDUGTIVE TELEPHONE AND TELEGRAPHIU INSTALLATION.

APPLICATION FILED AUG\17, 1911. 1,,(M5A18m 4 SHEETS SHEET 3.

NITNES$ES1 Patented NOV. 26, 1912.

H. VON KRAMER. INDUCTIVE TELEPHONE AND TELEGRAPHIC INSTALLATION.

APPLICATION FILED AUG.17,1911

Patented Nov. 26, 1912.

4 SHEETSSHEET 4.

HANS VON KRAMER, 0F ERDlN-GTON, MRMINGHAM, ENGLAND.

INDUCTIVE TELEPHONE 'TELEGRAPHIG INSTALLATION.

Specification of Letters Yatent.

Patented Nov. 26, i912.

Application filed August 17, 1911. Serial Iva-644,515.

To all whom it may concern;

Be it known that I, HANS VON KRAMER, subject of the Emperor of Germany, residing at 21 Wood End road, Erdington, Birmingham, in the'county of Warwick, England, have invented a new and useful Inductive Telephone and Telegraphic Installation; and I do hereby declare the following to be a full, clear, and exact description.

of the same.

Myinvention comprises improvements in inductive wireless telephone and telegraphic installations of the type described in my prior specification Serial No. 590,726; and has for its object to. provide an'apparatHs capable of use both for telephony and telegraphy.

My telegraphic and telephonic installation is particularly useful for sending telegraphic, and telephonic signals and to receive instantaneous replies between a railway train and a line station, or to a line station from a railway train, either when the train is in motion or stationary; or from one moving or stationary train to another train; or for other similar purposes such as on cars, boats, airships, lifts, or the like hand or power propelled vehicles, while they are in motion or temporarily at standstill, either between or among themselves or be tween them and railway stations, roads, harbors, river banks, quays, buildings or other stationary places, or between an of the above named vehicles and any stationary or portable telegraphic or telephonic station or stations.

In the said prior specification, I have shown and described a wireless inductive telephone installation embodying a non inductive ground wire andcoil or frame carried by the vehicle and in inductive relation to the ground wire, the ground wire and coil being-each capable. of being put into circuit with either a transmitter and battery or a receiver at will; whereby telephone communications may take place to or from a moving vehicle when stationary or in mo tion.

According to my present invention 1 pro vide an installation adapted for use either for instantaneous telegraphy or telephony,

the line wire or induction frame around the vehicle beingso arranged that they may be employed either for transmitting telegraphic signs, or for transmitting speech, or for receiving telegraphic or telephonic sials,

without the operation of'a single switch to change over from telegraphy to telephony.

With my system as will be seen from the various diagrams it is possible to interrupt the sender of a message instantaneously while engaged in transmitting a message and so save much time and inconvenience and perhaps serious trouble. The interruption when telephoning is caused by speaking into the mouthpiece of the transmitter while the receiver is engaged to deliver the senders message and so carry on a conversation without the use of change over switches just as is the case in an ordinary conversation. When it is desired to interrupt the sender of a telegraphic message'it is likewise possible to interrupt the sender by simply operating the Morse key switch and so warn the sender or stop him after every wordif notproperly understood or to stop him in delivering a lengthy or unimportant message instead of having to wait until the sender has finished. This may prove par.- ticularly useful in railway work. v

Referring to the drawings, Figure 1 diagrammatically shows the line circuit and Fig. 2 is a similar View of a movable circuit.

Fig. 3 illustrates the apparatus as contained in a call box at the line station. Fig. t is a similar view of the call box carried by the movable vehicle.

, The stationary side of the installation-or line circuit and also the movable side or train equipment may each be said to broadly comprise three circuits viz 1. a telephone transmitting circuit, 2. a tele aph transmitting circuit and 3. a receiving circuit which is the same both for telephony and telegraphy.

As shown in Fi l the line wire 1, which may be several miles long and is laid parallel to the track in manner described in the prior specification, has its one terminal 2 connected to a terminal 3 on the pivoted end of the switch l which normally engages the contact 5 which is connected to the secondary side 6 of the telephone transmitters which are then connected to the double headgear receiver 7 and from that to the terminal 8. lhis transmitting member is shown as being of triple form as it is necessary to transmit through the resistance of a long length of ground wire and then by the induction frame tothe train, the primary coils 9 being in circuit with batteries lfl and mouth pieces 11, the circuits being provided mitting or to. have the secondary of the" inductive coils in circuit when listening; and

for this purpose I may employ a key switch 13 which would be brought onto the contact 14 to short circuit the receiver when transcircuit the transmitter when listening. This switch is particularly useful when receiving .or sending a lengthy message but its use is not necessary during ordinary conversation. The apparatus includes a Morse key 18 one contact of which is in circuit with the battery 19, and through the make and break terminal 20 with the vibratingreed-2l of the vlbrator 22, thecurrent assing when the make and break terminal 1s in contact with the reed through the reed and then through the magnets or magnet. 24 to the point 25 and then through the wire 26 to the lever of the Morse key thus completing the battery circuit operating the vibrator when the key is depressed. The vibrating current is taken oil in parallel from the vibrator coil or coils passing from the point 25 through the vari able inductance 27 by the wire 28 to the spring raised switch 4 normallydepressed by, but insulated from, the Morse key, the said switch closing the circuit when the tapper is depressed, thereby putting the telegraphic appliance into circuit with the ground loop, the return being through the condenser to the line wire. Thus whenever the Morse key is depressed a vibratory current is passing through the line wire and which current is inductively. transmitted to the receiving frame 31 carried by the vehicle and this being in circuit with a re- .celver, the dots and dashes are sent in the usual manner, and received in the telephone receiver as from the vibrator. The installat1on carriedlay the vehicle issim'ilar to that of the line circuit exceptthat the receiving frame 31 and the transmitting frame 32, as seen in Fig. 2, take the place of the ground wlre loop. These two frames are employed so that the user may carryon an uninterrupted c'pnversation without using a change over switch to transfer from listening to speaklng and vice versa. The receiving frame 31 and receiver 7 are connected to the rear of the Morse key the receiving cir-' mittingand onto the contact 15 to short cuit being completed when the key is in its normal andinoperative position. One terminal 33 of the transmitting frame 32 is connected to the terminal 3 through the key switch 34, battery 35, and transmitter 36,

.the other terminal 37 of the frame being .connected tothe .switch 34 by the wire 38; the operation and arrangement of this switch and terminalsbeing the same'as previously described with reference to the ground circuit.

InFig. 3 I have shown a perspective view of a call box 40 as employed at a line station equipped with my apparatus, part of one side of the box being broken away. The

door 4lis preferably a window over the desk I ranged the Morse key and key switch, the

surface being sloped conveniently for .WIlting down messages. At the front to the right hangs the receiver, and to the left above the desk the transmitter 11 which is supported by rubber cords 44 whereby it is insulated from vibration. The seat 42 contains the batteries. 1 v Fig. 4 shows. a similar view of the call box as on a train, the arrangement being similar to that already described except that the batteries are preferably carried in the slope desk; while the seat is preferably supported on a resilient base or pad 45.

As will be seen, by my invention I provide. an apparatus or installation whereby it 1 is possible to both telephone and telegraph to or from a movingvvehicle and to interrupt the sender of a message at the other end at will, either from or to a line station or a second moving vehicle equipped with corresponding apparatus, without the operation of a single change-over-switch from telegraphy to telephony and simply by either speakinginto the telephone transmitter or wiring the telegraphic key as is desired.

As shown the line wire is arranged at suitable distances whereby .the circuit is rendered noninductive to outside influences such as neighboring telegraph wires running parallel to a railway line.

What I claim then is v 1. In a combined telephone and telegraphic installation for use with movable vehicles, the combination of a'line wire laid substantially arallel to the direction in which the vehicle travels, and having its out and return portions crossed at intervalsvto make it non-inductive to nei hboring telegraph wires and similar isturbing. influences; a telephone transmitting apparatus including a transmitter, an induction coil I i ome -1e and a source of electricity;a'telegraph apparatus located at a line station including j said means being arrangedto put the tele-' means for creating a vibrating currentin the circuit; a source of electricity, and means for making and breakingthe circuit,

" graphic apparatus into circuit with the line wire when saidmeans areoperated;-means for receiving the telephone or telegraph messages; a wire frame carried by the vehicle;

a telephonictransmitting apparatus; a -tel'e graphic apparatus carried by the vehicle and including means for creating a vibrat- "ing current in 'this telegraphic circuit, a

source of electricity and means for making and breaking the circuit; said means being arran ed to 'ut the telegraphic apparatus into circuit with the frame when said means are operated; and means for putting'either the telephonic apparatus or the telegraphic transmitting apparatus into circuit with the said frame; all for the purpose specified and substantially as se forth. I i

2. In a combined telephone and (telegraphic installation for use with movable vehicles, the combination of a line wirelaid substantially parallel to the direction in which the vehicle travels, and having. its out and return port-ions crossed at intervals to make it non-inductive to neighboring telegraph wires and similar. disturbing influences; a telephone transmitting apparatus including a transmitter, an induction coil and a sourceyof electricity; a telegraph apparatus located at a like station including means for creating a vibrating current in the circuit, a source of electricity, and means for making and breaking the circuit, said means being arranged to put the telegraphic apparatus into circuit with the line wire when said means are operated; means for receivingthe telephone or telegraph mes.-

the line wire, and means for collecting both the telephonic and telegraphic messages; all for the purpose specified and substantially as set forth.

3. In a combined telephone and telegraph vinstallation for use with moving vehicles,

the combination of a line wire laid parallel .to the direction in which the vehicle travels and having its out and return portions ratus, a telegrap crossed at intervals to make it .non inductive to neighboring" telegraph wires and similar disturbing influences; a telephone transmitting apparatus including a transmitter, an-

induction coil, and a battery, atelegraphic apparatus located at a line station including a=vibrator,-a battery, and Mcrse key, the

Morse key being arranged to put the-telegraphic apparatus into circuit with'the line wire when saidkey is depressed; an ear re-vw ceiver-for collecting both the'telephone'and telegraph messages, a wire frame carried by the vehicle;a telephonic transmitting appaic apparatus carried by. the vehicle and including a vibrator, a battery, and a Morse key the 'Morse key being arranged to put the telegraph apparatus into circuit'with the frame when saidkey is depressed, means for putting either the telephonic transmitting apparatus or the mic-5 5 graphic transmitting apparatus in circuit with the said frame; a second frame carried by the vehicle and also in inductive relation with the line wire, and an earreceiver for. collecting both the telephonic and tele-rgraphic messages; all for the purpose specified'and substantially as set forth.-

4. In a combined telephone and telegraph installation for-use with moving vehicles,

the combination of'a line wire laid parallels vto thedirection in which the vehicle travels and*having its out and I return portions crossed at-intervals to=make it non inductive to neighboring telegraph wires and similar disturbing influences; a telephone transmit apparatus located at aline station including a vibrator, a battery, and Morse key, the

'Morse key being arranged to put the -tele-.-

graph apparatus into circuit with the line wire when said key is'depressed; an ear-receiver for collecting both thetelephone and telegraph messages; and means for putting the telephone transmitting apparatus,'-telegraph sending apparatus, or receiving 'apparatus in circuit with the line-wire as'desired ;=-a frame carried by the vehicle and in inductive relation with the line wire; a tele-- phone transmitting apparatus; a telemnh apparatus carried by the vehicle and-including a vibrator, a battery and a -Morsev'key, the Morse key being arranged to put the telegraph apparatus into circuit with the frame-when said'key is depressed, a receiv ing apparatus; and means for putting the telephone transmitting apparatus, telegraph sending apparatus, or receiving apparatus in circuit with-the frame carried by the vehicle as'desired, all for the purpose specified and substantially as set forth.

5.- In a combined telephone and telegraph installation for: use with moving vehicles,

the combination of a line wire-laid parallel to thedirection in which the-vehicle travels 100 tingapparatus including a transmitter; an i induction coil and a battery; a telegraph.

and having its out and return 'portions crossed'at intervals to make it non inductive to neighboring telegra h wires and similar disturbing influences; a telephonic transmitting apparatus; a telegraph apparatus located at a line station and including a v1- brator; a battery; and Morse key, the Morse key being arranged to put the telegraph apparatus into circuit with the line wire when said key is depressed; a receiving apparatus; and means for putting the telephone transmitting apparatus, telegraph sendingapparatus, or receiving apparatus in circuit wlth the line wire as desired; a wire frame carried by the vehicle, and in lnductlve relation with the line wire; a tele hone transmitting apparatus; a telegrap apparatus carried by the vehicle and including a vibrator, a battery, and a Morse key the Morse key being arranged to put the telegraph apparatus lnto circuit with the frame when said key is depressed; means for putting either the telephonic transmitting apparawe or the telegraphic sending apparatus in circuit with the said frame; a second frame carried by the vehicle and also in lnductive relation with the line wire, and an ear re,-

ceiver for collecting both the telephonic and telegraphic messages; all for the I purpose specified and substantially as set forth.

6. In a combined telephone and telegraph 1 installation for use with moving vehicles,

the combination of a line wire laid parallel to the direction in which the vehicle travels and having its out and return portions crossed at intervals to make it non inductive toneighborin telegraph wires and similar disturbing in uences; a telephone transmitting apparatus including a transmitter, an

induct-ion .coil and a battery; a telegraph apparatus located at a line stat-ion and ineluding a vibrator, a battery, and Morse key, the Morse key being arranged to put the telegraph apparatus into circuit with the line wire when said key is depressed, an ear receiver for collecting both the telephone and telegraph messages, a wire frame cartelegraphic messages; T all "for the purpose specified and substantially as set forth.

7. In a combined telephone and telegraph installation for use with movin vehicles, the combination of a line Wire, lald parallel to the direction in which-the vehicle travels and having its out and return portions crossed at intervals to make it no 1 1 inductive to neighboring telegraph wires and similar disturbing influences, a telephone transmittingv apparatus including a transmitting,

vehicle and including a vibrator; a battery;

and a Morse key, the Morse key being arranged to put the telegraph apparatus into circuit with the frame when said key is depressed, and an ear receiver for collecting both the telephone and telegraph messages; all for the purpose specifiedand substantially asset forth.

8. -In a combined telephone and telegraph installation for use with-moving vehicles, the combination ofalinewire laid parallel to the direction in which the vehicle travels and having its out and return portions crossed atintervals to make it non inductive to nei hborin telegraph wires and similar distur ing-in uences; a'telephone transmit:

ting apparatus including a transmitter; an

induction coil; and a battery; a telegraph apparatus located at a line station and includin 'a vibrator; a battery; and Morse key; t e Morse key being arranged to put the telegraph apparatus-into circuit ,with

the line wire ,when'said key is depressed; a receiving apparatus; a telegraphic apparatus carried by'the vehicle and including a vibrator; a battery; and a Morse key, the

Morse key being arranged to put the telegraph apparatus into circuit with the frame when said key isdepressed, a wire frame carried by the vehicle, and in inductive relationwith the line wire; a telephone transmitting apparatus; a telegraph sending apparatus; means for putting either the telephonic transmitting apparatus or the telegraphic sending apparatus in circuit with the said frame; a second, frame carried bythe vehicle and also in inductive relation with the line wire; and an ear receiver for collecting both the tele' honic and telegraphic messages; all fort e purposes specified and substantially as set forth.

9. In a combined telephone and telegraph installation for use with, moving the combination of a line wire laid parallel to the direction in which the vehicle travels and having itsv out and return portions crossed at intervals to make it non inductive to neighborin telegraph wires and similar disturbing in uences; a telephone transmit ting apparatus including a transmitter, an induction coil, and a battery; a telegraph apparatus located at a line station including a vibrator, a battery, and Morse key, the

vehicles,

and telegraph messagesfa wire frame. carried by "the vehicle; a telephonic transmittingapparatus; a telegraph apparatus carried by thevehicle and including a vibrator, a battery, and a Morse key, the;Morse key belng arranged to-put the telegraph apparatus nto circuit with the frame when said key is depressed means for putting either the telephonic; transmitting apparatus or the telegraphic transmitting apparatus in circuit with the said frame; a second frarne carried by the vehicle and also in inductlve relation with the line wire; and an ear receiver for collecting both the telephonic and telegraphic messages; all for the purpose specified and substantially as set forth.

In testimonywhereof, I have signed my name to this specification in the presence of two subscribing witnesses.

H. V KRAMER.

Witnesses: v

NORMAN S. BARLOW, STANLEY L. LIGHTFOOT. 

